FEATURE: Add scopes to API keys (#9844)

* Added scopes UI

* Create scopes when creating a new API key

* Show scopes on the API key show route

* Apply scopes on API requests

* Extend scopes from plugins

* Add missing scopes. A mapping can be associated with multiple controller actions

* Only send scopes if the use global key option is disabled. Use the discourse plugin registry to add new scopes

* Add not null validations and index for api_key_id

* Annotate model

* DEV: Move default mappings to ApiKeyScope

* Remove unused attribute and improve UI for existing keys

* Support multiple parameters separated by a comma

app/assets/javascripts/admin/models/api-key.js

@@ -41,7 +41,7 @@ const ApiKey = RestModel.extend({
   },
 
   createProperties() {
-    return this.getProperties("description", "username");
+    return this.getProperties("description", "username", "scopes");
   },
 
   @discourseComputed()